BPH8 by Ohara

Obsolete Unknown Environmentally Dangerous
Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.3–2.4 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.3–2.4 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.330–2.400 µm
Optical Properties
Refractive Index (nd) 1.720467
Abbe Number (Vd) 34.716156
Dispersion Formula Sellmeier
Wavelength Range 0.3 — 2.4 µm
$$n(\lambda) = \sqrt{1 + \frac{1.59323\,\lambda^2}{\lambda^2 - 0.0103458} + \frac{0.277776\,\lambda^2}{\lambda^2 - 0.0474089} + \frac{1.04071\,\lambda^2}{\lambda^2 - 81.2864}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 5.4
TCE 100/300°C (10-6/K) 6.7
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[1.003 \times 10^{-5} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) 4.2
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance —
Stain Resistance —
Acid Resistance 53
Alkali Resistance —
Phosphate Resistance 4
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd
N-KZFS8 Schott 1.72047 34.7
H-TF8 CDGM 1.72046 34.757746
KZFS8 Schott 1.72047 34.613955
ADF455 Hoya 1.71852 33.456548
NBFD32 Hoya 1.73037 32.23
BAFD14 Hoya 1.699678 34.925493
CSBR Generic IR 1.69706 34.108015
BAFD8 Hoya 1.72342 37.99
H-ZBAF21 CDGM 1.72341 37.991564
D23-38 Corning 1.72349 37.995089
Similar Glasses (Ohara)
Glass Manufacturer nd Vd
S-NBH8 Ohara 1.720467 34.707984
BPH45 Ohara 1.718502 33.515702
BAH28 Ohara 1.72342 37.949115
S-BAH28 Ohara 1.72342 37.955602
BAH78 Ohara 1.723421 38.03427
S-NBH53V Ohara 1.737999 32.32659
S-NBH53 Ohara 1.737999 32.261312
LAM7 Ohara 1.749497 35.278026
S-LAM7 Ohara 1.749497 35.283397
S-NBH51 Ohara 1.749504 35.33248
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